Tektronix T921 User Manual

Adjustments-T921 /T922/T922R
'Requires TM500 Series Power Module .
PRELIMINARY PROCEDURE
WARNING
Dangerous potentials exist at several points inside
your
instrument . To prevent electrical shock, do not
touch exposed
connections or components when
the instrument is operated with the
cover removed .
Disconnect power cord plug from power
input
voltage source while disassembling or repairing this
instrument .
1 . Remove the cabinet
from the instrument . To remove
the T921/T922 cabinet,
remove the six retaining screws
(three on the top and three
on the bottom) and slide the
halves apart .
Because of
the
different mechanical layout
of
the
T922R, use Fig : 4-1 (which shows the adjustment
locations on the T922R) in place of Figs . 4-2 through 4-4
4-2
TABLE 4-1 (cont)
and 4-6 . The T922R cabinet is
made of
two pieces which
can be removed independently .
Each
half
is
held
onby
six
captive screws . To remove a cabinet half, turn the six
captive screws 90 degrees counterclockwise and lift the
cabinet half
away from the instrument . Use a large coin to
loosen the captive
screws .
2 . Check the 120 V/240 V
range selector switch S701
and fhe High/Low selector switch
S705 for correct set-
tings . For the T921 and T922, both switches are located
on
the bottom of the cabinet . For the T922R,see Fig . 4-1 for
the internal locations of S701 and S705 . If you change the
setting of the range selector switch, change the line fuse .
Refer to Electrical Parts List for correct fuse values .
3 . Turn the instrument on and allow at least 20 minutes
warm-up before starting the adjustment procedure .

,
For best overall accuracy,
make adjustments in an
ambient temperature
of +20°C to +30°C .
REV . A, JUNE 1976
Examples of Applicable
Description Minimum Specifications
Usage Test Equipment
4 . Square-Wave Generator Frequency, 1 kHz and High frequency
compen- a . Tektronix PG 506
100 kHz ; risetime, 2 ns sation and vertical
Calibration Generator .'
or less . attenuator adjustments
.
b .
Tektronix Type
106 Square-
Wave Generator .
5 . Cable Length, 42 in . ; impendance, Signal interconnection . a . Tektronix Part 012-0057-01 .
50 iZ
;
connectors, BNC .
6 . Termination
Impedance, 50
i'2
; connectors, Signal termination . a . Tektronix Part 011-0049-01 .
BNC
.
7 . Low-Capacitance ' Variable
capacitor adjust- a . General Cement adjustment
Screwdriver ments .
tool
G
.C .
8722 .
8 . Screwdriver
Length, 3 in . shaft ; bit size, Variable resistor adjust- a . Xcelite R-3323 .
3/32 in . ments .
9 . Alignment Tool Vertical attenuator
and a . General Cement Adjustment
high-frequency compen- tool G .C . 8722 .
sation adjustment .
10 . 10X Attenuator Ratio, 1OX ;
impedance, Vertical attenuator adjust- a . Tektronix Part
011-0059-02 .
50 G
;
connectors, BNC
.
ments
.
11 .
Probe, 1OX Attenuation, 10X ; Probe can Vertical attenuator com- a . P6006, Tektronix Part
be compensated for input pensation . 010-0160-00 . (Standard
characteristics of T921/T922/ accessory for T921/T922 .)
T 922 R .
12 . Adapter Probe-tip-to-BNC . Vertical
attenuator a . Tektronix Part 013-0054-00 .
compensation
.

Tektronix T921 Specifications

General

Brand	Tektronix
Model	T921
Category	Test Equipment
Language	English